I would make it delrin or nylon only. No need for sealing rubber at the pressures you are going to provided all the surfaces are true. Also, I wouldn't bother with o-rings or equalisation holes. Just make it a tight fit and you're good to go.
good to hear, that would simply the design. and make less headaches
If you have a lathe then wouldn't it be easier to just make those top and bottom holding plate things?.
In order to use the lathes i have to have to be supervised unfortunately, so im trying to limit lathe use.
I have a feeling that your rubber sealing face is going to get ripped straight off during piloting.
Yes, that happened a lot on the last high pressure cannon i worked on. Those bolts you circled were to keep the the two pipe rings on either end. they shouldn't actually have any force on them.
al-xg, i really like that design, and i think ill be able to use parts of it. id like to have a large reserve of air and be able to expand it if need be though, so i think the seperate air chamber would be necessary.
Also, is it difficult to achieve such high pressure seals with o- rings? i assumed it would, so that's why i used more of a clamping style.